Why such a provocative title ?

Many people think that generating enough heat for heating a whole building, simply by stirring water is not realistic, or at least that it has to be validated or proved.
No  worries ! Everything has already been validated since 1850 by James Prescott Joule. The totality of the mechanical energy recuperable by such a windmill dedicated to stirring water (even though  it is only 30% of the kinetic energy of the wind_ as expressed by the Betz limit), cannot be transformed into anything else than heat ! As soon as you can design the water-brake-stirrer sturdy enough to resist the force of the windmill, you are ensured to benefit from the totality of the available energy in terms of heat. The efficiency of transmission is 100% because all the losses by friction that generally impede the yield of an electric generator or a motor for instance, participate here to the heating of the building.


Why is it best suited for high-latitude countries ?

It is only a matter of economic trade-off. Generating heat is a lot more cost effective by using directly the solar energy via solar thermal panels. But in high latitude-countries the duration of the day is very short in winter, and most of the time cloudy, whereas the temperature is very low, and the wind is often permanent and strong.
In those countries the density of inhabitants is generally low and most of the people live in the cities. The electricity grid is not available everywhere.
Our proposed solution takes advantage of all those points and may then be more cost-effective in such isolated locations under high-latitudes (Northern or Southern hemisphere).